EN 301 437 : 1.1.1

TERMINAL EQUIPMENT (TE) - ATTACHMENT REQUIREMENTS FOR PAN-EUROPEAN APPROVAL FOR CONNECTION TO THE ANALOGUE PUBLIC SWITCHED TELEPHONE NETWORKS (PSTNS) OF TE SUPPORTING THE VOICE TELEPHONY SERVICE IN WHICH NETWORK ADDRESSING, IF PROVIDED, IS BY MEANS OF DUAL TONE MULTI FREQUENCY (DTMF) SIGNALLING

European Telecommunications Standards Institute